[troyb]

You can assign a keyboard shortcut to any bookmark via the Keyboard & Mouse system preference pane. Since each bookmark appears in the Bookmarks menu they work just like any other menu item in this respect. That's not to say that it wouldn't be handy if possible to do within OmniWeb, just that there are options out there!

Also, I was able to make a vimeo video embedded on another page go fullscreen. Do you have an example that isn't working for you?